Patent GB-190301609-A (GB)
Title: Improvements in Apparatus for Delivering Measured Quantities of Fluids.
Inventor: SOUTHEY ALFRED WILLIAM
Filed: 1903-01-22
Granted: 1904-01-21
Abstract: 1609. Southey, A. W. Jan. 22. Measured quantities, delivering.-In an apparatus in which the delivery of a liquid is checked, after a certain quantity has been delivered, by a valve actuated by the movement of the diaphragm or piston of a chamber gradually filled by the liquid, the following improvements are made :-A valve is added to allow the measured quantity to be drawn in instalments ; the measuring-chamber is duplicated, one emptying as the other fills. Two modifications, one suitable for flushing purposes, and another for mixing two liquids in any proportion, are also described. A sectional plan of the apparatus is shown in Fig. 3. The liquid is supplied through the pipe d, and passes through one of the valves f<1>, f<2>, through a passage g', g<2>, and through the valve c', c<2>, to the discharge pipe e. The valve f being open, the liquid also passes through the passage i<1> at a rate governed by the stop-cock j<1> into the chamber a<1>, and forces out the liquid in the chamber a<2> through the passage k<2> and through the open valve m<2> into the discharge pipe. When the chamber a<1> is full, the valve e<2> closes and stops the delivery. For the next supply, the valves f<1>, m<2> are closed and f<2>, m<1> opened, and a similar process occurs, the chamber a<2> now being filled. The valves are actuated by cams on the shaft r turned by a handle. Fig. 2 is a sectional elevation on the line 2-2 of Fig. 3 ; the cams q<1>, q<2>, at each quarter revolution, depress one of the flaps p<1>, p<2>, which shuts down one pair of valves and allows the spring t to raise the other flap, closing the other pair. The extra valve u on the delivery pipe is shown, in Fig. 4, with a handle w and spring x which only permit it to be quite closed or wide open. While the valve is closed, the supply to the measuring-chamber is checked. For flushing purposes, one of the passages g<1>, say, is blocked, so that, while the chamber a<1> is filling, there will be no discharge, and, by regulating the stop-cock j<1>, the necessary interval may be adjusted. Fig. 5 shows a sectional view of a modification suitable for higher pressures, in which pistons are used in place of diaphragms. The valves f<1>, m<1> are here put on the same rod, and the pipe d is divided into two branches d<1>, d<2>, but otherwise the action is the same. By connecting the branches d<1>, d<2> to supplies of different liquids, the two may be delivered into the same vessel and mixed in any desired proportion. The Provisional Specification states that it may be desirable to apply a permanent pressure, such as a spring, weight, or fluid pressure, tending to close the discharge valve. Liquid meters.-The Provisional Specification states that the apparatus may be used as a continuously-acting meter. For this purpose, the measuring-chambers are separated by two other chambers with a larger diaphragm between them, the passage to each measuring-chamber being permanently open to a regulated amount, the supply to the middle chambers being governed by a valve, and the exit passages being open to the discharge pipe. If the left-hand middle chamber is being supplied, the diaphragms will move slowly to the right, and the movement is caused to operate the valves so as to reverse the process. In the modification for flushing purposes, the Provisional Specification describes the use of a single measuring-chamber, having constricted passages for entrance and exit with a non-return valve in each.